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<?php function test(array $array) { return !(bool)count(array_filter(array_keys($array), 'is_string')); } $arr = false; test($arr);
Output for 8.3.0 - 8.3.7
Fatal error: Uncaught TypeError: test(): Argument #1 ($array) must be of type array, false given, called in /in/lQKdB on line 7 and defined in /in/lQKdB:3 Stack trace: #0 /in/lQKdB(7): test(false) #1 {main} thrown in /in/lQKdB on line 3
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18
Fatal error: Uncaught TypeError: test(): Argument #1 ($array) must be of type array, bool given, called in /in/lQKdB on line 7 and defined in /in/lQKdB:3 Stack trace: #0 /in/lQKdB(7): test(false) #1 {main} thrown in /in/lQKdB on line 3
Process exited with code 255.
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Fatal error: Uncaught TypeError: Argument 1 passed to test() must be of the type array, bool given, called in /in/lQKdB on line 7 and defined in /in/lQKdB:3 Stack trace: #0 /in/lQKdB(7): test(false) #1 {main} thrown in /in/lQKdB on line 3
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33
Fatal error: Uncaught TypeError: Argument 1 passed to test() must be of the type array, boolean given, called in /in/lQKdB on line 7 and defined in /in/lQKdB:3 Stack trace: #0 /in/lQKdB(7): test(false) #1 {main} thrown in /in/lQKdB on line 3
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Catchable fatal error: Argument 1 passed to test() must be of the type array, boolean given, called in /in/lQKdB on line 7 and defined in /in/lQKdB on line 3
Process exited with code 255.

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